The journey to sacred places is the most common way that people travel in India. They are always going on pilgrimages to sacred places. They are always undertaking spiritual journeys to visit the great shrines in the Himalayan tier of pilgrimage places; these places are called tirthas, a word that means "crossing place," a place where you can cross the river to the far shore but also cross over into another dimension of life. Cross over to heaven, in one sense it's used.

I was a young woman who had grown up in the mountains of Montana as a Protestant Methodist in a pretty good social gospel tradition. I became fascinated with the religious lives of others who seemed also to be very religious, yet in ways that were quite different from my own. That fascination led to relationships, in India and elsewhere, with families of Hindus, of Muslims, of Sikhs, and a lot of study.

India is a culture in which religious life and spirituality is very much on the surface of things. That doesn't mean it doesn't have depth, but it is very visible. There are lots of temples, lots of Islamic centers, lots of gurdwaras, and lots of teachers.

I grew up going around with family, camping and living in a very beautiful mountain valley, knowing the names of the mountains and the rivers. I think it's no accident that I ended up studying the geography of India and knowing the names of the mountains and the rivers and all of that. I loved it. I think it gives a sense of space and a can-do-ness that was very powerful.

Those are big challenges in our age, not just how we live as co-citizens in societies with people of different faiths and different cultures - I mean, that's a big challenge itself - but how we think about all that as Christians, or as Jews, or as Muslims, or as Hindus. How do we think about the religious other? There's a theological dimension as well as a civic dimension to our pluralism.

We are built on a structure of the freedom of religion and the non-establishment of religion. That really is a pretty sturdy rudder for the U.S.

The idea of going on a spiritual journey is really part of the DNA of India itself.